[portland] Still Having List/Tuple Problems

[Rich Shepard]

On Wed, 16 Apr 2008, jason kirtland wrote:

> # option 2) make groups, each sharing a common 'left' item
> from itertools import groupby
> from operator import itemgetter
>
> for left, grouped in groupby(list_o_tuples, itemgetter(0)):
>     print left
>     for left_again, right in grouped:
>         print "\t", right
>
> # look under the hood at what groupby() does in 2)
> for left, grouped in groupby(list_o_tuples, itemgetter(0)):
>     print left, list(grouped)

   Thanks, Jason. I obviously still don't fully understand 'groupedby', but
This is what I need to create nested for loops.

   Hope it sticks this time!

Rich

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